001/*
002 * Units of Measurement API
003 * Copyright (c) 2014-2015, Jean-Marie Dautelle, Werner Keil, V2COM.
004 *
005 * All rights reserved.
006 *
007 * Redistribution and use in source and binary forms, with or without modification,
008 * are permitted provided that the following conditions are met:
009 *
010 * 1. Redistributions of source code must retain the above copyright notice,
011 *    this list of conditions and the following disclaimer.
012 *
013 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions
014 *    and the following disclaimer in the documentation and/or other materials provided with the distribution.
015 *
016 * 3. Neither the name of JSR-363 nor the names of its contributors may be used to endorse or promote products
017 *    derived from this software without specific prior written permission.
018 *
019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
020 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
021 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
022 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
023 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
024 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
025 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
026 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
027 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
028 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
029 */
030package javax.measure.spi;
031
032import java.util.Set;
033
034import javax.measure.format.UnitFormat;
035
036/**
037 * <p>
038 * This interface represent the service to obtain {@link UnitFormat} instances.
039 * </p>
040 * 
041 * @author <a href="mailto:[email protected]">Jean-Marie Dautelle</a>
042 * @author <a href="mailto:[email protected]">Werner Keil</a>
043 * @version 0.6, $Date: 2015-11-03 $
044 */
045public interface UnitFormatService {
046
047    /**
048     * Returns the default unit format.
049     * 
050     * It is up to implementations what to consider a suitable default.
051     * For some (locale-sensitive) implementations it may be a unit format based on <code>Locale.getDefault()</code> while others may return <code>getUnitFormat("Simple")</code> or <code>getUnitFormat("ISO")</code>
052     *
053     * @return the default {@link UnitFormat} implementation.
054     */
055        UnitFormat getUnitFormat();
056
057    /**
058     * Returns the unit format having the specified name or
059     * <code>null</code> if none.
060     * 
061     * For example <code>getUnitFormat("UCUM")</code> to return a UCUM specific {@link UnitFormat} implementation. 
062     *
063     * @param name the name of the format.
064     * @return the corresponding unit format.
065     */
066        UnitFormat getUnitFormat(String name);
067        
068    /**
069     * Gets a list with available format names for this format service.
070     * @return list of available formats, never null.
071     */
072    Set<String> getAvailableFormatNames();
073}